The Lian Li Lancool III wins in 7 out of 8 comparable specs. Its biggest advantage is 2.5" Bays (300% better).
4000D RS Frame wins in 1 spec (MSRP: 27% better).
Recommendation
Choose Lancool III if you want the best overall performance — especially 2.5" bays.
Choose 4000D RS Frame if msrp matters more to you.
| Spec | Corsair4000D RS Frame | Lian LiLancool III |
|---|---|---|
| Design | ||
| Type | ATX Mid Tower | ATX Mid Tower |
| Side Panel | Tempered Glass | Tempered Glass |
| Weight | 8 | 12.2 |
| Compatibility | ||
| Max GPU Length | 370 mm | 435 mm+18% |
| Max Cooler Height | 170 mm | 180 mm+6% |
| Max PSU Length | 200 mm | 220 mm+10% |
| Max Radiator | 360 mm | 420 mm+17% |
| Motherboard Support | ATX, Micro ATX, Mini ITX | ATX, EATX, Micro ATX, Mini ITX |
| Cooling | ||
| Included Fans | 3 | 4+33% |
| Storage | ||
| 2.5" Bays | 2 | 8+300% |
| 3.5" Bays | 2 | 4+100% |
| I/O | ||
| Front I/O | 1x USB-C, 1x USB-A 3.0, Audio | 1x USB-C, 2x USB-A 3.0, Audio |
| Price | ||
| MSRP | $110−27% | $150 |
| Release Date | Jan 2025 | Jul 2022 |
